单项选择题

A．$160.
B．$150.
C．$180.
D．$120.
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单项选择题
A．She must look after the passengers and do routine work.B．She must fulfill special duties under all situations.C．She must remain calm in case of an emergency.D．She must keep the plane in normal order.
A．She must look after the passengers and do routine work.
B．She must fulfill special duties under all situations.
C．She must remain calm in case of an emergency.
D．She must keep the plane in normal order.
单项选择题
A．David has little interest in music.B．He has not played the violin for a long time.C．David has met Miss Hanson before.D．He is a very good violin player.
A．David has little interest in music.
B．He has not played the violin for a long time.
C．David has met Miss Hanson before.
D．He is a very good violin player.
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